The purpose of the present invention is to provide a flavor improving agent for reducing alcoholic taste and enhancing aromatic scent in a specific alcoholic beverage when the specific alcoholic beverage is imbibed, a method for providing or producing an alcoholic beverage having reduced alcoholic taste and enhanced aromatic scent, while inhibiting bubbling caused by adding the flavor improving agent in a specific alcoholic beverage when the specific alcoholic beverage is to be imbibed, etc. When an alcoholic beverage (a) or (b) is to be imbibed, a flavor improving agent comprising a high CO